The skge driver 1.5 in Linux kernel 2.6.15 on Ubuntu does not properly use the spin_lock and spin_unlock functions, which allows remote attackers to cause a denial of service (machine crash) via a flood of network traffic.
http://secunia.com/advisories/28971
http://www.securityfocus.com/bid/26511
http://www.ubuntu.com/usn/usn-578-1
https://bugs.launchpad.net/ubuntu/+source/linux-source-2.6.15/+bug/65631